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Table 3 Correlation between total number of PCR-positive assays and rates of progression disease or median survivals

From: Serial detection of circulating tumour cells by reverse transcriptase-polymerase chain reaction assays is a marker for poor outcome in patients with malignant melanoma

No. of positive assays No. of patients No. of PDs (%) median DFS (months) median OS (months)
0 18 3 (17) 81 83
1 46 8 (17) 81 83
2 45 12 (27) 82 83
3 27 17 (63) 78 79
4–5 13 9 (69) 66 70
  1. PD, progression disease; DFS, disease free-survival; OS, overall survival